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- Canyi Lu, Changbo Zhu, Chunyan Xu, Shuicheng Yan, Zhouchen Lin
- AAAI
- 2015

This work studies the Generalized Singular Value Thresholding (GSVT) operator Prox σ g (·), Prox σ g (B) = arg min X m i=1 g(σi(X)) + 1 2 ||X − B|| 2 F , associated with a nonconvex function g defined on the singular values of X. We prove that GSVT can be obtained by performing the proximal operator of g (denoted as Proxg(·)) on the singular values since… (More)

- Changbo Zhu, Huan Xu, Chenlei Leng, Shuicheng Yan
- NIPS
- 2014

In this paper, we present theoretical analysis of SON – a convex optimization procedure for clustering using a sum-of-norms (SON) regularization recently proposed in [8, 10, 11, 17]. In particular, we show if the samples are drawn from two cubes, each being one cluster, then SON can provably identify the cluster membership provided that the distance between… (More)

- Angel Borja, Suzanne B Bricker, +8 authors Changbo Zhu
- Marine pollution bulletin
- 2008

In recent years, several sets of legislation worldwide (Oceans Act in USA, Australia or Canada; Water Framework Directive or Marine Strategy in Europe, National Water Act in South Africa, etc.) have been developed in order to address ecological quality or integrity, within estuarine and coastal systems. Most such legislation seeks to define quality in an… (More)

- Changbo Zhu, Huan Xu
- ArXiv
- 2015

In many problems in machine learning and operations research, we need to optimize a function whose input is a random variable or a probability density function, i.e. to solve optimization problems in an infinite dimensional space. On the other hand, online learning has the advantage of dealing with streaming examples, and better model a changing… (More)

- Junwei Li, Shuanglin Dong, +4 authors Changbo Zhu
- Aquaculture International
- 2014

The effects of supplementation with the benthic diatom Cylindrotheca fusiformis on the growth of the sea cucumber Apostichopus japonicus and water quality was studied in six sea cucumber culturing ponds (600 m2 each) from November 2011 to November 2012. The nutrients for sea cucumbers in the control group were supplied solely by the spring tide inflow;… (More)

In the following development, we consider the following problem Prox g (b) = arg min x≥0 f b (x) = g(x) + 1 2 (x − b) 2 , (1) where g(x) satisfies the following assumption. Set C b (x) = b − x and D(x) = ∇g(x). Let ¯ b = sup{b | C b (x) and D(x) have no intersection}, and x ¯ b 2 = inf{ x | (x, y) is the intersection point of C¯ b (x) and D(x)}. 1.1 Proof… (More)

- Suwen Chen, Jinfeng Wu, Lixiong Chen, Changbo Zhu
- Journal of Applied Phycology
- 2010

Two 60-day experiments were conducted to study the influence of photon flux density (PFD) and temperature on the attachment and development of Gloiopeltis tenax and Gloiopeltis furcata tetraspores. In the first experiment, tetraspores of the two Gloiopeltis species were incubated at five temperature ranges (8°C, 12°C, 16°C, 20°C, 24°C) under a constant PFD… (More)

- Changbo Zhu, Huan Xu, Shuicheng Yan
- ArXiv
- 2015

With the success of modern internet based platform , such as Amazon Mechanical Turk, it is now normal to collect a large number of hand labeled samples from non-experts. The Dawid-Skene algorithm, which is based on Expectation-Maximization update, has been widely used for inferring the true labels from noisy crowdsourced labels. However, Dawid-Skene scheme… (More)

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